/* ── Design Tokens ─────────────────────────────────────────────────────────── */
:root {
  --bg:         #09090f;
  --surface:    #111118;
  --surface-2:  #1a1a24;
  --surface-3:  #22222e;
  --border:     rgba(255,255,255,0.07);
  --border-hover: rgba(255,255,255,0.14);

  --accent:     #7c3aed;
  --accent-2:   #2563eb;
  --accent-glow: rgba(124,58,237,0.35);

  --text:       #f1f5f9;
  --text-2:     #94a3b8;
  --text-3:     #475569;

  --success:    #10b981;
  --warning:    #f59e0b;
  --danger:     #ef4444;

  --radius-sm:  8px;
  --radius:     12px;
  --radius-lg:  18px;
  --radius-xl:  24px;

  --shadow:     0 4px 24px rgba(0,0,0,0.4);
  --shadow-lg:  0 8px 48px rgba(0,0,0,0.6);

  --transition: 0.2s cubic-bezier(0.4,0,0.2,1);
}

/* ── Reset ─────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; scroll-behavior: smooth; overflow-x: hidden; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

img, svg { display: block; max-width: 100%; }

/* ── Scrollbar ─────────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* ── Typography ────────────────────────────────────────────────────────────── */
h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.3rem, 3vw, 1.7rem); font-weight: 600; letter-spacing: -0.01em; }
h3 { font-size: 1.1rem; font-weight: 600; }
p  { color: var(--text-2); }

/* ── Utilities ─────────────────────────────────────────────────────────────── */
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.w-full { width: 100%; }
.text-center { text-align: center; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.hidden { display: none !important; }

/* ── Gradient text ─────────────────────────────────────────────────────────── */
.gradient-text {
  background: linear-gradient(135deg, #a78bfa 0%, #60a5fa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Buttons ────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  white-space: nowrap;
  user-select: none;
  font-family: inherit;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 0 20px var(--accent-glow);
}
.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 4px 28px var(--accent-glow);
}
.btn-primary:active:not(:disabled) { transform: translateY(0); }

.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--surface-3);
  border-color: var(--border-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--text-2);
  padding: 8px 12px;
}
.btn-ghost:hover:not(:disabled) { background: var(--surface-2); color: var(--text); }

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.btn-icon:hover { background: var(--surface-3); color: var(--text); border-color: var(--border-hover); }

.btn-lg { padding: 14px 28px; font-size: 1rem; border-radius: var(--radius-lg); }
.btn-sm { padding: 7px 14px; font-size: 0.8rem; }

.btn-danger {
  background: rgba(239,68,68,0.15);
  color: var(--danger);
  border: 1px solid rgba(239,68,68,0.3);
}
.btn-danger:hover:not(:disabled) { background: rgba(239,68,68,0.25); border-color: var(--danger); }

.btn-success {
  background: rgba(16,185,129,0.15);
  color: var(--success);
  border: 1px solid rgba(16,185,129,0.3);
}
.btn-success:hover:not(:disabled) { background: rgba(16,185,129,0.25); border-color: var(--success); }

/* ── Form elements ──────────────────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: 6px; }

label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-2);
}

input[type="text"],
input[type="email"],
input[type="password"] {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  padding: 11px 14px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
}
input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.15);
}
input::placeholder { color: var(--text-3); }

/* ── Card ───────────────────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

/* ── Alert ──────────────────────────────────────────────────────────────────── */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 0.88rem;
  display: none;
}
.alert.show { display: block; }
.alert-error { background: rgba(239,68,68,0.12); border: 1px solid rgba(239,68,68,0.25); color: #fca5a5; }
.alert-success { background: rgba(16,185,129,0.12); border: 1px solid rgba(16,185,129,0.25); color: #6ee7b7; }

/* ── Badge ──────────────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-purple { background: rgba(124,58,237,0.18); color: #a78bfa; border: 1px solid rgba(124,58,237,0.25); }
.badge-blue   { background: rgba(37,99,235,0.18);  color: #60a5fa; border: 1px solid rgba(37,99,235,0.25); }
.badge-green  { background: rgba(16,185,129,0.15);  color: #34d399; border: 1px solid rgba(16,185,129,0.25); }
.badge-yellow  { background: rgba(245,158,11,0.15);  color: #fbbf24; border: 1px solid rgba(245,158,11,0.25); }
.badge-danger  { background: rgba(239,68,68,0.15);   color: #f87171; border: 1px solid rgba(239,68,68,0.25); }

/* ── Spinner ────────────────────────────────────────────────────────────────── */
.spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ═══════════════════════════════════════════════════════════════════════════════
   AUTH PAGE
═══════════════════════════════════════════════════════════════════════════════ */
.auth-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
  background:
    radial-gradient(ellipse 80% 60% at 20% -10%, rgba(124,58,237,0.15) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 80% 110%, rgba(37,99,235,0.12) 0%, transparent 60%),
    var(--bg);
}

.auth-container {
  width: 100%;
  max-width: 420px;
}

.auth-logo {
  text-align: center;
  margin-bottom: 32px;
}
.auth-logo-img {
  width: 220px;
  height: auto;
  margin-bottom: 8px;
  display: block;
  margin-left: auto;
  margin-right: auto;
}
.auth-logo p  { font-size: 0.9rem; margin-top: 6px; }

.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px;
  box-shadow: var(--shadow-lg);
}

/* Tabs */
.auth-tabs {
  display: flex;
  background: var(--surface-2);
  border-radius: var(--radius);
  padding: 4px;
  margin-bottom: 28px;
}
.auth-tab {
  flex: 1;
  padding: 9px;
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  color: var(--text-2);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}
.auth-tab.active {
  background: var(--surface-3);
  color: var(--text);
  box-shadow: 0 1px 4px rgba(0,0,0,0.3);
}

.auth-form { display: flex; flex-direction: column; gap: 16px; }
.auth-form .btn-primary { margin-top: 8px; }

.auth-divider {
  text-align: center;
  color: var(--text-3);
  font-size: 0.8rem;
  margin: 16px 0;
  position: relative;
}
.auth-divider::before, .auth-divider::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 42%;
  height: 1px;
  background: var(--border);
}
.auth-divider::before { left: 0; }
.auth-divider::after  { right: 0; }

.languages-preview {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 24px;
}
.lang-pill {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 0.75rem;
  color: var(--text-3);
}
.lang-pill span:first-child { font-size: 1.5rem; }

/* ═══════════════════════════════════════════════════════════════════════════════
   NAVBAR
═══════════════════════════════════════════════════════════════════════════════ */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(9,9,15,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
}
.nav-logo-img { height: 32px; width: auto; }

.navbar-brand {
  display: flex;
  align-items: center;
}
.logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
}
.logo-link:hover { color: var(--text); }
.nav-brand-name {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  white-space: nowrap;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-user {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-2);
}
.nav-avatar {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   DASHBOARD
═══════════════════════════════════════════════════════════════════════════════ */
.dashboard-page {
  min-height: calc(100vh - 64px);
  padding: 40px 24px 120px;
  max-width: 1100px;
  margin: 0 auto;
}

.dashboard-header {
  margin-bottom: 40px;
}
.dashboard-header p { margin-top: 8px; font-size: 1rem; }

/* Step labels */
.step-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}
.step-num {
  width: 26px; height: 26px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.step-label h2 { font-size: 1rem; color: var(--text-2); font-weight: 500; }

/* ── Language cards ──────────────────────────────────────────────────────────── */
.language-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}

.language-card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.language-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(124,58,237,0.08), rgba(37,99,235,0.04));
  opacity: 0;
  transition: opacity var(--transition);
}
.language-card:hover { border-color: var(--border-hover); transform: translateY(-2px); }
.language-card:hover::before { opacity: 1; }
.language-card.selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 0 20px rgba(124,58,237,0.2);
}
.language-card.selected::before { opacity: 1; }

.lang-flag  { font-size: 3rem; margin-bottom: 12px; }
.lang-name  { font-size: 1.1rem; font-weight: 700; margin-bottom: 4px; }
.lang-native { font-size: 0.85rem; color: var(--text-3); }

.lang-check {
  position: absolute;
  top: 12px; right: 12px;
  width: 22px; height: 22px;
  background: var(--accent);
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  color: #fff;
}
.language-card.selected .lang-check { display: flex; }

/* ── Load-more button (languages) ───────────────────────────────────────────── */
.lang-section-content {
  margin-bottom: 48px;   /* owns the bottom spacing, replaces grid's margin */
}
.lang-section-content .language-grid {
  margin-bottom: 16px;   /* gap between cards and the load-more button */
}

.lang-load-more { text-align: center; }

.lang-extra { display: none !important; }

.lang-load-more-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: 100px;
  color: var(--text-3);
  padding: 9px 22px;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}
.lang-load-more-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-2);
  background: var(--surface-2);
}

/* ── Level grid ──────────────────────────────────────────────────────────────── */
.level-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  margin-bottom: 48px;
}

.level-card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 12px;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.level-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(16,185,129,0.08), rgba(37,99,235,0.04));
  opacity: 0;
  transition: opacity var(--transition);
}
.level-card:hover { border-color: var(--border-hover); transform: translateY(-2px); }
.level-card:hover::before { opacity: 1; }
.level-card.selected {
  border-color: #10b981;
  box-shadow: 0 0 0 1px #10b981, 0 0 20px rgba(16,185,129,0.2);
}
.level-card.selected::before { opacity: 1; }

.level-check {
  position: absolute;
  top: 10px; right: 10px;
  width: 20px; height: 20px;
  background: #10b981;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  color: #fff;
}
.level-card.selected .level-check { display: flex; }

.level-num {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, #10b981, #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 6px;
}
.level-emoji { font-size: 1.3rem; margin-bottom: 8px; }
.level-label { font-size: 0.88rem; font-weight: 700; margin-bottom: 6px; }
.level-desc  { font-size: 0.72rem; color: var(--text-3); line-height: 1.4; }

/* ── Topic grid ──────────────────────────────────────────────────────────────── */
.category-section { margin-bottom: 32px; }

.category-title {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 10px;
}

.topic-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.topic-card:hover { border-color: var(--border-hover); background: var(--surface-2); transform: translateY(-1px); }
.topic-card.selected {
  border-color: var(--accent);
  background: rgba(124,58,237,0.08);
  box-shadow: 0 0 0 1px rgba(124,58,237,0.3);
}
.topic-icon { font-size: 1.4rem; }
.topic-name { font-size: 0.88rem; font-weight: 600; color: var(--text); }
.topic-desc { font-size: 0.75rem; color: var(--text-3); line-height: 1.4; }

/* ── Start button (floating) ─────────────────────────────────────────────────── */
.start-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px 24px;
  background: rgba(9,9,15,0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  transform: translateY(100%);
  transition: transform var(--transition);
  z-index: 50;
}
.start-bar.visible { transform: translateY(0); }
.start-bar.show    { transform: translateY(0); }

.start-selection-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--text-2);
}
.start-selection-info .badge { font-size: 0.82rem; }

/* ═══════════════════════════════════════════════════════════════════════════════
   CONVERSATION PAGE
═══════════════════════════════════════════════════════════════════════════════ */
.conv-page {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Header */
.conv-header {
  background: rgba(9,9,15,0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
  gap: 12px;
}

.conv-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.conv-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.conv-title {
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.conv-header-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* TTS toggle */
.tts-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--text-2);
  cursor: pointer;
  user-select: none;
}
.tts-toggle input { display: none; }
.toggle-track {
  width: 36px; height: 20px;
  background: var(--surface-3);
  border-radius: 10px;
  position: relative;
  transition: background var(--transition);
}
.toggle-track::after {
  content: '';
  position: absolute;
  top: 3px; left: 3px;
  width: 14px; height: 14px;
  background: #fff;
  border-radius: 50%;
  transition: transform var(--transition);
}
.tts-toggle input:checked + .toggle-track { background: var(--accent); }
.tts-toggle input:checked + .toggle-track::after { transform: translateX(16px); }

/* Messages area */
.conv-messages {
  flex: 1;
  overflow-y: auto;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Greeting state */
.conv-loading-state {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
  color: var(--text-3);
}
.conv-loading-state .spinner {
  width: 28px; height: 28px;
  border-color: rgba(124,58,237,0.3);
  border-top-color: var(--accent);
}

/* Message bubbles */
.message {
  display: flex;
  gap: 10px;
  max-width: 720px;
  animation: msgIn 0.25s ease both;
}
@keyframes msgIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.message.user { align-self: flex-end; flex-direction: row-reverse; }
.message.assistant { align-self: flex-start; }

.msg-avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  flex-shrink: 0;
  margin-top: 2px;
}
.message.assistant .msg-avatar { background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.message.user .msg-avatar { background: var(--surface-3); }

.msg-body { display: flex; flex-direction: column; gap: 4px; max-width: calc(100% - 44px); }

.msg-bubble {
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  font-size: 0.95rem;
  line-height: 1.65;
  word-break: break-word;
}
.message.user .msg-bubble {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border-bottom-right-radius: 4px;
}
.message.assistant .msg-bubble {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-bottom-left-radius: 4px;
}

.msg-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 4px;
}
.message.user .msg-footer { justify-content: flex-end; }

.msg-time { font-size: 0.72rem; color: var(--text-3); }

.msg-play-btn {
  background: none;
  border: none;
  color: var(--text-3);
  cursor: pointer;
  font-size: 0.8rem;
  padding: 2px 6px;
  border-radius: 4px;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 4px;
}
.msg-play-btn:hover { background: var(--surface-3); color: var(--text-2); }
.msg-play-btn.playing { color: var(--accent); }

.msg-translate-btn {
  background: none;
  border: none;
  color: var(--text-3);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 3px;
  transition: background 0.15s, color 0.15s;
}
.msg-translate-btn:hover { background: var(--surface-3); color: var(--text-2); }
.msg-translate-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.msg-translation {
  margin-top: 6px;
  padding: 8px 12px;
  background: var(--surface-1);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.85rem;
  color: var(--text-2);
  line-height: 1.5;
  font-style: italic;
}
.msg-translation::before {
  content: 'EN · ';
  font-style: normal;
  font-weight: 600;
  color: var(--accent);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 0;
  animation: msgIn 0.25s ease both;
}
.typing-dots {
  display: flex;
  gap: 4px;
  padding: 12px 16px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  border-bottom-left-radius: 4px;
}
.typing-dots span {
  width: 6px; height: 6px;
  background: var(--text-3);
  border-radius: 50%;
  animation: bounce 1.2s ease infinite;
}
.typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.typing-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes bounce {
  0%, 60%, 100% { transform: translateY(0); }
  30%           { transform: translateY(-6px); }
}

/* Streaming bubble */
.message.streaming .msg-bubble::after {
  content: '▋';
  animation: blink 0.8s step-end infinite;
  color: var(--accent);
  margin-left: 2px;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

/* Input area */
.conv-input-area {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
}

.input-row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  max-width: 800px;
  margin: 0 auto;
}

.input-wrapper {
  flex: 1;
  position: relative;
}

#messageInput {
  width: 100%;
  min-height: 44px;
  max-height: 160px;
  padding: 11px 16px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  resize: none;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  line-height: 1.5;
  overflow-y: auto;
}
#messageInput:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.12);
}
#messageInput::placeholder { color: var(--text-3); }

/* Mic button */
.mic-btn {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all var(--transition);
  flex-shrink: 0;
}
.mic-btn:hover { background: var(--surface-3); color: var(--text); }
.mic-btn.recording {
  background: rgba(239,68,68,0.15);
  border-color: var(--danger);
  color: var(--danger);
  animation: pulse-ring 1.2s ease-out infinite;
}
@keyframes pulse-ring {
  0%   { box-shadow: 0 0 0 0   rgba(239,68,68,0.4); }
  70%  { box-shadow: 0 0 0 10px rgba(239,68,68,0);   }
  100% { box-shadow: 0 0 0 0   rgba(239,68,68,0);   }
}

/* Send button */
.send-btn {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: none;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all var(--transition);
  flex-shrink: 0;
  box-shadow: 0 0 12px var(--accent-glow);
}
.send-btn:hover:not(:disabled) { transform: scale(1.08); box-shadow: 0 0 20px var(--accent-glow); }
.send-btn:disabled { opacity: 0.4; cursor: not-allowed; box-shadow: none; }

.input-hint {
  text-align: center;
  font-size: 0.72rem;
  color: var(--text-3);
  margin-top: 8px;
}

/* ── Voice status bar ────────────────────────────────────────────────────────── */
.voice-status {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 6px 12px;
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.2);
  border-radius: var(--radius);
  font-size: 0.82rem;
  color: var(--danger);
  margin-bottom: 8px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
.voice-status.show { display: flex; }
.voice-dot {
  width: 8px; height: 8px;
  background: var(--danger);
  border-radius: 50%;
  animation: pulse-dot 1s ease infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.7); }
}

/* ── Audio indicator ─────────────────────────────────────────────────────────── */
.audio-playing-indicator {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--accent);
  padding: 4px 0;
}
.audio-playing-indicator.show { display: flex; }
.audio-bars { display: flex; gap: 2px; align-items: flex-end; height: 14px; }
.audio-bars span {
  width: 3px;
  background: var(--accent);
  border-radius: 2px;
  animation: bar-bounce 0.8s ease infinite;
}
.audio-bars span:nth-child(2) { animation-delay: 0.1s; }
.audio-bars span:nth-child(3) { animation-delay: 0.2s; }
.audio-bars span:nth-child(4) { animation-delay: 0.3s; }
@keyframes bar-bounce {
  0%, 100% { height: 4px; }
  50%       { height: 14px; }
}

/* ═══════════════════════════════════════════════════════════════════════════════
   TRIAL BANNER
═══════════════════════════════════════════════════════════════════════════════ */

.trial-banner, .pastdue-banner, .email-verify-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 10px 20px;
  font-size: 0.85rem;
  font-weight: 500;
  flex-wrap: wrap;
  text-align: center;
}
.email-verify-banner {
  background: rgba(124,58,237,0.12);
  border-bottom: 1px solid rgba(124,58,237,0.3);
  color: #c4b5fd;
}
.trial-banner {
  background: rgba(245,158,11,0.12);
  border-bottom: 1px solid rgba(245,158,11,0.25);
  color: #fbbf24;
}
.pastdue-banner {
  background: rgba(239,68,68,0.12);
  border-bottom: 1px solid rgba(239,68,68,0.25);
  color: var(--danger);
}
.pastdue-banner a { color: var(--danger); font-weight: 600; }

.trial-upgrade-btn {
  background: rgba(245,158,11,0.2);
  border: 1px solid rgba(245,158,11,0.4);
  color: #fbbf24;
  padding: 5px 14px;
  border-radius: var(--radius);
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background var(--transition);
}
.trial-upgrade-btn:hover { background: rgba(245,158,11,0.3); text-decoration: none; }

/* ═══════════════════════════════════════════════════════════════════════════════
   PLAN SELECTOR (register form)
═══════════════════════════════════════════════════════════════════════════════ */

.plan-select {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 4px 0 8px;
}

.plan-option {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}
.plan-option input[type="radio"] { display: none; }
.plan-option:hover { border-color: var(--border-hover); }
.plan-option.selected {
  border-color: var(--accent);
  background: rgba(124,58,237,0.08);
}

.plan-option-body { flex: 1; }
.plan-option-title { font-weight: 600; font-size: 0.9rem; color: var(--text); }
.plan-option-desc  { font-size: 0.78rem; color: var(--text-3); margin-top: 2px; }

.plan-check {
  width: 20px; height: 20px;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem;
  color: transparent;
  flex-shrink: 0;
  transition: all var(--transition);
}
.plan-option.selected .plan-check {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   PROFILE PAGE
═══════════════════════════════════════════════════════════════════════════════ */

.profile-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 8px 0;
}

/* ── Language progress cards ─────────────────────────────────────────────────── */
.lang-progress-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 12px;
}
.lang-progress-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 2px;
}
.lang-progress-flag { font-size: 1.8rem; line-height: 1; }
.lang-progress-title { font-size: 1rem; font-weight: 600; color: var(--text-1); }
.lang-progress-sub   { font-size: 0.78rem; color: var(--text-3); margin-top: 2px; }
.lang-level-badge {
  margin-left: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid;
  min-width: 72px;
}
.lang-level-cefr { font-size: 1rem; font-weight: 700; line-height: 1.2; }
.lang-level-name { font-size: 0.65rem; font-weight: 500; opacity: 0.85; }

/* Level guide (shown below cards) */
.level-guide {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  margin-top: 4px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
}
.level-guide-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.level-guide-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 6px;
  border: 1px solid;
  white-space: nowrap;
  flex-shrink: 0;
}
.level-guide-info {
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.level-guide-name { font-size: 0.78rem; font-weight: 500; color: var(--text-2); }
.level-guide-fp   { font-size: 0.7rem; color: var(--text-3); }

.profile-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}
.profile-row:last-of-type { border-bottom: none; }

.profile-label {
  font-size: 0.82rem;
  color: var(--text-3);
  width: 120px;
  flex-shrink: 0;
  font-weight: 500;
}

.profile-value {
  font-size: 0.9rem;
  color: var(--text);
  flex: 1;
}

.profile-actions {
  padding: 16px 20px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
  margin-top: 4px;
}

/* ── Level locked state ──────────────────────────────────────────────────────── */
.level-card.level-locked {
  opacity: 0.45;
  cursor: pointer;
  position: relative;
}
.level-card.level-locked:hover { opacity: 0.6; border-color: var(--warning); }
.level-lock {
  position: absolute;
  top: 8px; right: 8px;
  font-size: 0.85rem;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   ADMIN PAGE
═══════════════════════════════════════════════════════════════════════════════ */

.admin-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.admin-stat-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  text-align: center;
}

.admin-stat-num {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}

.admin-stat-label {
  font-size: 0.8rem;
  color: var(--text-3);
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.admin-user-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.admin-user-row {
  display: grid;
  grid-template-columns: 44px 1fr auto auto;
  align-items: center;
  gap: 16px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  transition: border-color var(--transition);
}
.admin-user-row:hover { border-color: var(--border-hover); }

.admin-user-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
  flex-shrink: 0;
}

.admin-user-info {
  min-width: 0;
}

.admin-user-name {
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.admin-user-email {
  font-size: 0.82rem;
  color: var(--text-2);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.admin-user-joined {
  font-size: 0.75rem;
  color: var(--text-3);
  margin-top: 2px;
}

.admin-user-status {
  flex-shrink: 0;
}

.admin-user-action {
  flex-shrink: 0;
  min-width: 80px;
  text-align: right;
}

.admin-user-action--multi {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: flex-end;
  min-width: 110px;
}

.admin-user-row--sub {
  grid-template-columns: 44px 1fr auto auto;
  align-items: start;
  padding: 16px 20px;
}

@media (max-width: 600px) {
  .admin-stats { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .admin-stat-card { padding: 16px 10px; }
  .admin-stat-num { font-size: 1.5rem; }

  .admin-user-row {
    grid-template-columns: 40px 1fr auto;
    grid-template-rows: auto auto;
  }
  .admin-user-status { display: none; }
  .admin-user-action { grid-column: 3; grid-row: 1 / 3; align-self: center; }
}

/* ═══════════════════════════════════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════════════════════════════════ */

/* Tablet */
@media (max-width: 900px) {
  .language-grid { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .level-grid    { grid-template-columns: repeat(5, 1fr); gap: 8px; }
  .topic-grid    { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
}

/* Mobile */
@media (max-width: 640px) {
  .dashboard-page { padding: 24px 16px 100px; }
  .language-grid  { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .language-card  { padding: 18px 10px; }
  .lang-flag      { font-size: 2.2rem; }
  .lang-name      { font-size: 0.9rem; }
  .lang-native    { font-size: 0.75rem; }

  .level-grid  { grid-template-columns: repeat(5, 1fr); gap: 6px; }
  .level-card  { padding: 14px 6px; }
  .level-num   { font-size: 1.5rem; }
  .level-emoji { font-size: 1rem; margin-bottom: 4px; }
  .level-label { font-size: 0.72rem; }
  .level-desc  { display: none; }

  .topic-grid { grid-template-columns: repeat(2, 1fr); }
  .topic-desc { display: none; }

  .auth-card { padding: 24px 20px; }

  .conv-messages { padding: 16px 12px; }

  .navbar { padding: 0 16px; }
  .nav-user span { display: none; }

  .start-bar { flex-direction: column; gap: 12px; }
  .start-selection-info { flex-wrap: wrap; justify-content: center; }

  .conv-header { padding: 0 12px; }
  .conv-meta .badge:last-child { display: none; }

  .message { max-width: 100%; }

  .input-hint { display: none; }
}

@media (max-width: 380px) {
  .language-grid { grid-template-columns: repeat(3, 1fr); gap: 6px; }
  .language-card { padding: 14px 8px; }
}

/* ── Tap-to-start overlay (iOS Safari AudioContext unlock) ──────────────────── */
.start-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(9, 9, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.start-overlay[hidden] { display: none; }

.start-card {
  background: var(--surface-2);
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  text-align: center;
  max-width: 320px;
  width: 90%;
  box-shadow: var(--shadow-lg);
}
.start-card .start-icon { font-size: 3rem; margin-bottom: 16px; }
.start-card h2 { font-size: 1.4rem; font-weight: 600; margin-bottom: 8px; }
.start-card p  { color: var(--text-2); font-size: 0.95rem; margin-bottom: 28px; }
.start-card .btn-start {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 36px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  box-shadow: 0 4px 20px var(--accent-glow);
  transition: opacity var(--transition), transform var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.start-card .btn-start:active { opacity: 0.85; transform: scale(0.97); }

/* ═══════════════════════════════════════════════════════════════════════════════
   STATS ROW (dashboard)
═══════════════════════════════════════════════════════════════════════════════ */

.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-bottom: 32px;
}

.stat-widget {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: border-color var(--transition);
  min-width: 0;
  overflow: hidden;
}
.stat-widget:hover { border-color: var(--border-hover); }

.stat-widget-icon { font-size: 1.8rem; flex-shrink: 0; }

.stat-widget-body { min-width: 0; }

.stat-widget-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}

.stat-widget-label {
  font-size: 0.75rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 4px;
}

/* Recent conversation widget */
.recent-conv-widget { grid-column: span 2; }

.recent-conv-info { margin-top: 6px; }

.recent-lang {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

.recent-topic {
  font-size: 0.8rem;
  color: var(--text-2);
  margin-top: 1px;
}

.recent-dur {
  font-size: 0.75rem;
  color: var(--text-3);
  margin-top: 3px;
}

.recent-summary {
  font-size: 0.78rem;
  color: var(--text-2);
  margin-top: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.recent-conv-actions { margin-top: 10px; }

/* ═══════════════════════════════════════════════════════════════════════════════
   ACHIEVEMENTS ROW (dashboard)
═══════════════════════════════════════════════════════════════════════════════ */

.achievements-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.achievements-label {
  font-size: 0.8rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.achievements-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.achievement-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(124,58,237,0.12);
  border: 1px solid rgba(124,58,237,0.25);
  color: #a78bfa;
  border-radius: 100px;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   PERSONALITY GRID (dashboard)
═══════════════════════════════════════════════════════════════════════════════ */

.personality-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
}

.personality-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px 12px;
  cursor: pointer;
  text-align: center;
  position: relative;
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.personality-card:hover { border-color: var(--border-hover); background: var(--surface-2); }
.personality-card.selected {
  border-color: var(--accent);
  background: rgba(124,58,237,0.08);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.12);
}

.personality-check {
  position: absolute;
  top: 8px; right: 8px;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: transparent;
  border: 1.5px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.65rem;
  color: transparent;
  transition: all var(--transition);
}
.personality-card.selected .personality-check {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.personality-icon { font-size: 1.8rem; margin-bottom: 6px; }
.personality-name { font-size: 0.82rem; font-weight: 600; color: var(--text); }
.personality-desc { font-size: 0.72rem; color: var(--text-3); margin-top: 4px; line-height: 1.4; }

/* ═══════════════════════════════════════════════════════════════════════════════
   CONVERSATION TIMER + END BUTTON
═══════════════════════════════════════════════════════════════════════════════ */

.conv-timer {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
  min-width: 36px;
  text-align: center;
}

.end-session-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 24px;
  color: var(--text-2);
  font-size: 0.9rem;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   SUMMARY PAGE
═══════════════════════════════════════════════════════════════════════════════ */

.summary-page {
  max-width: 860px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.summary-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 80px 0;
  color: var(--text-2);
}

.summary-error {
  text-align: center;
  padding: 80px 0;
  color: var(--text-2);
}

.summary-hero {
  text-align: center;
  margin-bottom: 32px;
}

.summary-hero-icon { font-size: 3rem; margin-bottom: 12px; }

.summary-hero h1 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  margin-bottom: 6px;
}

.summary-hero-sub {
  color: var(--text-2);
  margin-bottom: 20px;
}

.summary-meta-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 24px;
}

.summary-stats-strip {
  display: flex;
  gap: 0;
  justify-content: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  max-width: 480px;
  margin: 0 auto;
}

.summary-stat {
  flex: 1;
  padding: 16px 20px;
  text-align: center;
  border-right: 1px solid var(--border);
}
.summary-stat:last-child { border-right: none; }

.summary-stat-val {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.summary-stat-lbl {
  font-size: 0.72rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 4px;
}

.summary-stat-fp .summary-stat-val {
  color: #34d399;
}

.summary-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  margin-bottom: 16px;
}

.summary-section-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
}

.summary-text {
  color: var(--text-2);
  line-height: 1.7;
}

.summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.summary-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0;
}

.summary-list li {
  font-size: 0.88rem;
  color: var(--text-2);
  padding-left: 16px;
  position: relative;
}
.summary-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.summary-empty {
  font-size: 0.85rem;
  color: var(--text-3);
  font-style: italic;
}

.summary-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 32px;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   LEADERBOARD PAGE
═══════════════════════════════════════════════════════════════════════════════ */

.leaderboard-page {
  max-width: 700px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.leaderboard-header {
  text-align: center;
  margin-bottom: 32px;
}
.leaderboard-header p { color: var(--text-2); margin-top: 8px; }

.leaderboard-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 48px;
  color: var(--text-2);
}

.leaderboard-empty {
  text-align: center;
  padding: 48px;
  color: var(--text-2);
}
.leaderboard-empty .btn { margin-top: 16px; }

.lb-header-row {
  display: grid;
  grid-template-columns: 56px 1fr 140px 80px;
  gap: 0;
  padding: 10px 16px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-3);
  border-bottom: 1px solid var(--border);
}

.lb-row {
  display: grid;
  grid-template-columns: 56px 1fr 140px 80px;
  gap: 0;
  align-items: center;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}
.lb-row:last-child { border-bottom: none; }
.lb-row:hover { background: var(--surface-2); }
.lb-row-me { background: rgba(124,58,237,0.06) !important; }
.lb-row-me:hover { background: rgba(124,58,237,0.1) !important; }

.lb-rank-cell { display: flex; align-items: center; }
.lb-rank { font-size: 0.85rem; color: var(--text-3); font-weight: 600; }
.lb-medal { font-size: 1.3rem; }

.lb-name-cell {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.lb-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: #fff;
  flex-shrink: 0;
}

.lb-username {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lb-you {
  font-size: 0.7rem;
  background: rgba(124,58,237,0.2);
  color: #a78bfa;
  border-radius: 4px;
  padding: 1px 5px;
  font-weight: 600;
  vertical-align: middle;
  margin-left: 4px;
}

.lb-fp-cell { font-weight: 700; font-size: 0.9rem; color: var(--text); }
.lb-fp { color: #34d399; }
.lb-streak-cell { font-size: 0.85rem; color: var(--text-2); }

/* ═══════════════════════════════════════════════════════════════════════════════
   RESPONSIVE ADDITIONS
═══════════════════════════════════════════════════════════════════════════════ */

@media (max-width: 640px) {
  .stats-row { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .recent-conv-widget { grid-column: span 3; }

  .personality-grid { grid-template-columns: repeat(3, 1fr); }
  .personality-desc { display: none; }

  .summary-grid { grid-template-columns: 1fr; }

  .lb-header-row,
  .lb-row { grid-template-columns: 44px 1fr 100px 60px; }
  .lb-streak-cell { font-size: 0.75rem; }
}

@media (max-width: 420px) {
  .personality-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .recent-conv-widget { grid-column: span 2; }
  .stat-widget { padding: 12px 10px; gap: 8px; }
  .stat-widget-icon { font-size: 1.4rem; }
  .stat-widget-value { font-size: 1.3rem; }
}

/* ═══════════════════════════════════════════════════════════════════════════════
   PAGE TABS (dashboard / leaderboard / summary / profile)
═══════════════════════════════════════════════════════════════════════════════ */

.page-tabs {
  display: flex;
  align-items: center;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}

.page-tab {
  display: inline-flex;
  align-items: center;
  padding: 12px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color var(--transition), border-color var(--transition);
  text-decoration: none;
}
.page-tab:hover { color: var(--text); text-decoration: none; }
.page-tab.active { color: var(--text); border-bottom-color: var(--accent); }

/* ═══════════════════════════════════════════════════════════════════════════════
   LEARNING MODE GRID (dashboard step 4)
═══════════════════════════════════════════════════════════════════════════════ */

.learning-mode-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.learning-mode-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  cursor: pointer;
  position: relative;
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.learning-mode-card:hover { border-color: var(--border-hover); background: var(--surface-2); }
.learning-mode-card.selected {
  border-color: var(--accent);
  background: rgba(124,58,237,0.08);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.12);
}
.learning-mode-card.coming-soon { cursor: default; opacity: 0.6; }
.learning-mode-card.coming-soon:hover { border-color: var(--border); background: var(--surface); opacity: 0.6; }

.learning-mode-icon { font-size: 2rem; margin-bottom: 8px; }
.learning-mode-name { font-size: 0.95rem; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.learning-mode-desc { font-size: 0.78rem; color: var(--text-3); line-height: 1.4; }

.coming-soon-badge {
  display: inline-flex;
  align-items: center;
  background: rgba(245,158,11,0.15);
  color: #fbbf24;
  border: 1px solid rgba(245,158,11,0.3);
  border-radius: 100px;
  padding: 2px 8px;
  font-size: 0.68rem;
  font-weight: 600;
  margin-top: 8px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   COMING SOON PANEL (dashboard step 5 for non-conversational modes)
═══════════════════════════════════════════════════════════════════════════════ */

.coming-soon-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 56px 32px;
  text-align: center;
  color: var(--text-2);
}
.coming-soon-panel-icon { font-size: 3rem; margin-bottom: 16px; }
.coming-soon-panel h3 { font-size: 1.2rem; color: var(--text); margin-bottom: 10px; }
.coming-soon-panel p { max-width: 500px; margin: 0 auto; font-size: 0.9rem; line-height: 1.7; }

/* ═══════════════════════════════════════════════════════════════════════════════
   ACTIVITY TABS (dashboard step 5 — conversational sub-sections)
═══════════════════════════════════════════════════════════════════════════════ */

.activity-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
  gap: 0;
}

.activity-tab-btn {
  padding: 10px 18px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-2);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
  font-family: inherit;
}
.activity-tab-btn:hover { color: var(--text); }
.activity-tab-btn.active { color: var(--text); border-bottom-color: var(--accent); }

.activity-tab-panel { display: none; }
.activity-tab-panel.active { display: block; }

/* ═══════════════════════════════════════════════════════════════════════════════
   TRAVEL CARDS (AI Travel Mode destination cards)
═══════════════════════════════════════════════════════════════════════════════ */

.travel-grid {
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
}

.travel-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 14px;
  cursor: pointer;
  text-align: center;
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.travel-card:hover { border-color: var(--border-hover); background: var(--surface-2); }
.travel-card.selected {
  border-color: var(--accent);
  background: rgba(124,58,237,0.08);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.12);
}

.travel-card-flag { font-size: 2.4rem; margin-bottom: 8px; }
.travel-card-city { font-size: 0.9rem; font-weight: 600; color: var(--text); }
.travel-card-desc { font-size: 0.72rem; color: var(--text-3); margin-top: 6px; line-height: 1.4; }

/* ═══════════════════════════════════════════════════════════════════════════════
   GRAMMAR & SKILLS ACTIVITY CARDS
═══════════════════════════════════════════════════════════════════════════════ */

.activity-section-intro {
  font-size: 0.85rem;
  color: var(--text-3);
  margin-bottom: 16px;
}

.grammar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
}

.grammar-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  cursor: pointer;
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.grammar-card:hover { border-color: var(--border-hover); background: var(--surface-2); }
.grammar-card.selected {
  border-color: var(--accent);
  background: rgba(124,58,237,0.08);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.12);
}

.grammar-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.grammar-card-icon { font-size: 1.8rem; }

.grammar-card-tag {
  font-size: 0.68rem;
  font-weight: 600;
  background: rgba(37,99,235,0.12);
  color: #60a5fa;
  border: 1px solid rgba(37,99,235,0.2);
  border-radius: 100px;
  padding: 3px 9px;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 4px;
  flex-shrink: 0;
}

.grammar-card-name { font-size: 0.95rem; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.grammar-card-desc { font-size: 0.78rem; color: var(--text-3); line-height: 1.4; }

.cultural-tag {
  font-size: 0.68rem;
  font-weight: 600;
  background: rgba(245,158,11,0.12);
  color: #fbbf24;
  border: 1px solid rgba(245,158,11,0.25);
  border-radius: 100px;
  padding: 3px 9px;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: 4px;
  flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════════════════════════
   IMMERSION MODE — Dashboard (warning panel + scenario cards)
═══════════════════════════════════════════════════════════════════════════════ */

.immersion-warning {
  display: flex;
  gap: 16px;
  background: rgba(124,58,237,0.07);
  border: 1px solid rgba(124,58,237,0.25);
  border-radius: var(--radius-lg);
  padding: 20px 22px;
  margin-bottom: 20px;
  align-items: flex-start;
}

.immersion-warning-icon { font-size: 1.8rem; flex-shrink: 0; margin-top: 2px; }

.immersion-warning strong {
  display: block;
  font-size: 0.95rem;
  color: var(--text);
  margin-bottom: 6px;
}

.immersion-warning p {
  font-size: 0.83rem;
  color: var(--text-2);
  margin: 0 0 8px;
  line-height: 1.5;
}

.immersion-rules-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.immersion-rules-list li {
  font-size: 0.78rem;
  color: var(--text-3);
  padding-left: 14px;
  position: relative;
}
.immersion-rules-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.immersion-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.immersion-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 18px;
  cursor: pointer;
  transition: all var(--transition);
  -webkit-tap-highlight-color: transparent;
}
.immersion-card:hover { border-color: var(--border-hover); background: var(--surface-2); }
.immersion-card.selected {
  border-color: var(--accent);
  background: rgba(124,58,237,0.08);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.12);
}

.immersion-card-icon { font-size: 1.8rem; margin-bottom: 8px; }
.immersion-card-name { font-size: 0.95rem; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.immersion-card-desc { font-size: 0.78rem; color: var(--text-3); line-height: 1.4; }

/* ═══════════════════════════════════════════════════════════════════════════════
   IMMERSION MODE — Conversation page banner
═══════════════════════════════════════════════════════════════════════════════ */

.immersion-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background: rgba(124,58,237,0.1);
  border-bottom: 1px solid rgba(124,58,237,0.2);
  font-size: 0.8rem;
  font-weight: 600;
  color: #a78bfa;
  flex-shrink: 0;
}
.immersion-banner[hidden] { display: none !important; }

.immersion-banner-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  animation: pulse-dot 2s ease infinite;
}

@media (max-width: 640px) {
  .learning-mode-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .learning-mode-desc { display: none; }
  .activity-tab-btn { padding: 10px 12px; font-size: 0.78rem; }
  .travel-grid { grid-template-columns: repeat(2, 1fr); }
  .grammar-grid { grid-template-columns: 1fr; }
  .immersion-warning { flex-direction: column; gap: 10px; }
  .immersion-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .immersion-card-desc { display: none; }
}

/* ── Prefs banner ──────────────────────────────────────────────────────────── */
.prefs-banner {
  background: linear-gradient(135deg, rgba(99,102,241,0.15), rgba(168,85,247,0.15));
  border-bottom: 1px solid rgba(99,102,241,0.3);
  padding: 10px 24px;
  font-size: 0.875rem;
  color: var(--text-2);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.prefs-banner.hidden { display: none; }

/* ── Lesson action cards ───────────────────────────────────────────────────── */
.action-card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 28px 0;
}
.action-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  transition: all 0.2s;
}
.action-card:hover {
  border-color: var(--accent);
  background: rgba(99,102,241,0.08);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}
.action-card-continue { border-color: rgba(99,102,241,0.4); }
.action-card-continue:hover { background: rgba(99,102,241,0.1); border-color: rgba(99,102,241,0.7); }
.action-card-new { border-color: rgba(16,185,129,0.4); }
.action-card-new:hover { background: rgba(16,185,129,0.1); border-color: rgba(16,185,129,0.7); }
.action-card-icon {
  font-size: 2rem;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(255,255,255,0.06);
  flex-shrink: 0;
}
.action-card-body    { flex: 1; min-width: 0; }
.action-card-name    { font-weight: 600; font-size: 1rem; color: var(--text); }
.action-card-desc    { font-size: 0.8rem; color: var(--text-3); margin-top: 4px; }
@media (max-width: 500px) {
  .action-card-grid { grid-template-columns: 1fr; }
}

/* ── Recent lessons grid ───────────────────────────────────────────────────── */
.recent-lessons-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 12px;
}
.recent-lesson-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.2s;
}
.recent-lesson-card:hover {
  border-color: var(--accent);
  background: rgba(99,102,241,0.08);
  transform: translateX(4px);
}
.recent-lesson-flag  { font-size: 2rem; flex-shrink: 0; }
.recent-lesson-body  { flex: 1; min-width: 0; }
.recent-lesson-topic { font-weight: 600; font-size: 0.95rem; }
.recent-lesson-meta  { font-size: 0.8rem; color: var(--text-3); margin-top: 2px; }
.recent-lesson-date  { font-size: 0.75rem; color: var(--text-3); margin-top: 4px; }
.recent-lesson-arrow { font-size: 1.25rem; color: var(--text-3); flex-shrink: 0; }

/* ── Mode cards ────────────────────────────────────────────────────────────── */
.mode-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.2s;
}
.mode-card:hover { border-color: var(--accent); background: rgba(99,102,241,0.08); }
.mode-card.selected { border-color: var(--accent); background: rgba(99,102,241,0.12); }
.mode-card-coming-soon { opacity: 0.6; cursor: default; }
.mode-card-coming-soon:hover { border-color: var(--border); background: var(--surface); }
.mode-card-icon { font-size: 1.75rem; flex-shrink: 0; }
.mode-card-body { flex: 1; min-width: 0; }
.mode-card-name { font-weight: 600; font-size: 0.9rem; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.mode-card-desc { font-size: 0.8rem; color: var(--text-3); margin-top: 4px; }

/* ── Topic category/grid (new dashboard) ───────────────────────────────────── */
.topic-category       { margin-bottom: 28px; }
.topic-category-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  margin-bottom: 10px;
}
.topic-info      { flex: 1; min-width: 0; }

/* ── Start chip ────────────────────────────────────────────────────────────── */
.start-chip {
  display: inline-flex;
  align-items: center;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 10px;
  font-size: 0.8rem;
  color: var(--text-2);
}

/* ── Profile preferences ───────────────────────────────────────────────────── */
.pref-row        { display: flex; flex-direction: column; gap: 10px; }
.pref-row-label  { font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-3); }
.pref-lang-grid  { display: flex; gap: 10px; flex-wrap: wrap; }
.pref-lang-card  {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 16px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--surface);
  cursor: pointer; transition: all 0.15s; font-size: 0.875rem;
}
.pref-lang-card:hover    { border-color: var(--accent); }
.pref-lang-card.selected { border-color: var(--accent); background: rgba(99,102,241,0.12); }
.pref-level-grid { display: flex; gap: 8px; flex-wrap: wrap; }
.pref-level-card {
  display: flex; flex-direction: column; align-items: center;
  padding: 10px 16px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--surface);
  cursor: pointer; transition: all 0.15s; min-width: 72px;
}
.pref-level-card:hover    { border-color: var(--accent); }
.pref-level-card.selected { border-color: var(--accent); background: rgba(99,102,241,0.12); }
.pref-level-num  { font-size: 1.25rem; font-weight: 700; }
.pref-level-name { font-size: 0.7rem; color: var(--text-3); margin-top: 2px; text-align: center; }
.pref-personality-grid { display: flex; gap: 10px; flex-wrap: wrap; }
.pref-personality-card {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 14px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--surface);
  cursor: pointer; transition: all 0.15s; font-size: 0.8rem;
}
.pref-personality-card:hover    { border-color: var(--accent); }
.pref-personality-card.selected { border-color: var(--accent); background: rgba(99,102,241,0.12); }
.pref-save-status { color: #10b981; font-size: 0.875rem; font-weight: 500; }
.pref-save-status.hidden { display: none; }
.prefs-onboarding-hint {
  background: rgba(99,102,241,0.12);
  border: 1px solid rgba(99,102,241,0.3);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 16px;
  font-size: 0.875rem;
  color: var(--text-2);
}
.prefs-onboarding-hint.hidden { display: none; }

/* ── Vocab / Flashcard ─────────────────────────────────────────────────────── */
.flashcard-page {
  min-height: 100vh;
  background: var(--bg);
  display: flex;
  flex-direction: column;
}
.flashcard-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 16px 48px;
  gap: 24px;
}
.flashcard-header {
  text-align: center;
  width: 100%;
  max-width: 560px;
}
.flashcard-header h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0 0 4px;
}
.flashcard-header p {
  color: var(--text-2);
  font-size: 0.875rem;
  margin: 0;
}
.progress-bar-wrap {
  width: 100%;
  max-width: 560px;
  background: var(--surface-2);
  border-radius: 999px;
  height: 6px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 999px;
  transition: width 0.4s ease;
}
.progress-label {
  font-size: 0.8rem;
  color: var(--text-2);
  text-align: center;
  margin-top: 6px;
}

/* Card scene (perspective container) */
.flashcard-scene {
  perspective: 1000px;
  width: 100%;
  max-width: 460px;
  height: 260px;
}
.flashcard {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.5s ease;
  cursor: pointer;
}
.flashcard.flipped {
  transform: rotateY(180deg);
}
.flashcard-front,
.flashcard-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: calc(var(--radius) * 1.5);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: 0 4px 24px rgba(0,0,0,0.25);
}
.flashcard-back {
  transform: rotateY(180deg);
  background: rgba(99,102,241,0.08);
  border-color: rgba(99,102,241,0.3);
}
.flashcard-word {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-align: center;
  line-height: 1.1;
  margin-bottom: 12px;
}
.flashcard-phonetic {
  font-size: 0.95rem;
  color: var(--text-2);
  letter-spacing: 0.04em;
  font-style: italic;
}
.flashcard-flip-hint {
  position: absolute;
  bottom: 12px;
  font-size: 0.75rem;
  color: var(--text-2);
  opacity: 0.6;
}
.flashcard-translation {
  font-size: 1.8rem;
  font-weight: 600;
  text-align: center;
  color: var(--accent);
}
.flashcard-translation-label {
  font-size: 0.8rem;
  color: var(--text-2);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* Status and attempts */
.vocab-status {
  min-height: 32px;
  font-size: 0.95rem;
  font-weight: 500;
  text-align: center;
  padding: 6px 16px;
  border-radius: var(--radius);
  transition: all 0.2s;
}
.vocab-status.correct  { background: rgba(16,185,129,0.15); color: #10b981; }
.vocab-status.incorrect { background: rgba(239,68,68,0.12);  color: #f87171; }
.vocab-status.feedback  { background: rgba(234,179,8,0.12);  color: #fbbf24; font-size: 0.85rem; }
.vocab-attempts {
  font-size: 0.8rem;
  color: var(--text-2);
  text-align: center;
}
.vocab-controls {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
  max-width: 460px;
}
.vocab-controls .btn {
  flex: 1;
  min-width: 120px;
  max-width: 160px;
}

/* Manual fallback buttons (no speech recognition) */
.vocab-manual-btns {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  width: 100%;
  max-width: 460px;
}

/* Completion screen */
.flashcard-complete {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px 16px;
  gap: 20px;
  text-align: center;
}
.flashcard-complete-icon {
  font-size: 3.5rem;
  line-height: 1;
}
.flashcard-complete h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
}
.vocab-complete-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  width: 100%;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.vocab-stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
}
.vocab-stat-row .label { color: var(--text-2); }
.vocab-stat-row .value { font-weight: 600; }
.vocab-weak-list {
  text-align: left;
  font-size: 0.85rem;
  color: var(--text-2);
  padding-left: 16px;
  margin: 0;
}
.vocab-weak-list li { margin-bottom: 4px; }
.vocab-complete-btns {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

/* Loading state */
.vocab-loading {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: var(--text-2);
}

/* Listening pulse animation */
@keyframes listenPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.6; transform: scale(1.05); }
}
.btn.listening {
  animation: listenPulse 1s infinite;
  background: rgba(99,102,241,0.25);
  border-color: var(--accent);
}

/* ── Sentence Builder ─────────────────────────────────────────────────────────── */
.sentence-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  width: 100%;
  max-width: 560px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  text-align: center;
}
.sentence-card-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-2);
}
.sentence-english {
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-1);
}
.sentence-input-area {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  max-width: 560px;
}
.sentence-textarea {
  width: 100%;
  min-height: 80px;
  padding: 12px 14px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-1);
  font-family: inherit;
  font-size: 1rem;
  resize: vertical;
  box-sizing: border-box;
  transition: border-color 0.15s;
}
.sentence-textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.sentence-input-controls {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}
.sentence-feedback {
  width: 100%;
  max-width: 560px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-align: center;
}
.sentence-feedback-status {
  font-weight: 700;
  font-size: 1rem;
}
.sentence-feedback-status.correct   { color: #10b981; }
.sentence-feedback-status.incorrect { color: #f87171; }
.sentence-feedback-status.feedback  { color: #fbbf24; }
.sentence-feedback-text {
  font-size: 0.9rem;
  color: var(--text-2);
}
.sentence-corrected {
  font-size: 0.95rem;
  color: #10b981;
  font-style: italic;
  margin-top: 4px;
}